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Re: [XEN PATCH 5/5] xen: fix MISRA regressions on rule 20.9 and 20.12
- To: Nicola Vetrini <nicola.vetrini@xxxxxxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxxx
- From: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
- Date: Sat, 1 Jun 2024 13:47:46 +0100
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- Cc: sstabellini@xxxxxxxxxx, michal.orzel@xxxxxxx, xenia.ragiadakou@xxxxxxx, ayan.kumar.halder@xxxxxxx, consulting@xxxxxxxxxxx, Simone Ballarin <simone.ballarin@xxxxxxxxxxx>, Doug Goldstein <cardoe@xxxxxxxxxx>, George Dunlap <george.dunlap@xxxxxxxxxx>, Jan Beulich <jbeulich@xxxxxxxx>, Julien Grall <julien@xxxxxxx>
- Delivery-date: Sat, 01 Jun 2024 12:48:01 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 01/06/2024 11:16 am, Nicola Vetrini wrote:
> ea59e7d780d9 ("xen/bitops: Cleanup and new infrastructure ahead of
> rearrangements")
> introduced new violations on previously clean rules 20.9 and 20.12.
>
> The first is introduced because CONFIG_CC_IS_CLANG in xen/self-tests.h is not
> defined in the configuration under analysis. Using "defined()" instead avoids
> relying on the preprocessor's behaviour upon encountering an undedfined
> identifier
> and addresses the violation.
>
> The violation of Rule 20.12 is due to "val" being used both as an ordinary
> argument
> in macro RUNTIME_CHECK, and as a stringification operator.
>
> No functional change.
>
> Fixes: ea59e7d780d9 ("xen/bitops: Cleanup and new infrastructure ahead of
> rearrangements")
> Signed-off-by: Nicola Vetrini <nicola.vetrini@xxxxxxxxxxx>
Thankyou for this patch. I'd seen that I'd broken something. (Entirely
my fault - I've done a lot of testing in Gitlab for the series, but
never manually ran the Eclair jobs. I'll try to remember better next time.)
One question though.
https://gitlab.com/xen-project/xen/-/jobs/6994213979 says:
Failure: 1 regressions found for clean guidelines
service MC3R1.R20.9: (required) All identifiers used in the
controlling expression of `#if' or `#elif' preprocessing directives
shall be #define'd before evaluation:
violation: 1
While there is a report for 20.12, it's not clean yet (so the first
sentence wants adjusting), and RUNTIME_CHECK doesn't show up newly in it.
So, while I agree that RUNTIME_CHECK() should be included in the 20.12
exclusions, why is current Gitlab Run not reporting it?
~Andrew
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